Samsung UN32D5500RF - No Video_Hdmi1, 2, 3, 4 - Digital Signal

4-7
4. Troubleshooting
No video_HDMI1, 2, 3, 4 - Digital signal 
Symptom Audio is normal but no picture is displayed on the screen. -
Major
checkpoints
Check the HDMI source. -
Check the HDMI switch, Check the Chelsea. -
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. -
Diagnostics
Main Assy
1 B5V 2 SW_PW
3 B5V 4 A5V
5 GND 6 GND
7 B12VS 8 GND
9 B12VS 10 SW_INV
11 B13V 12 NC
13 B13V 14 DMM
Power Assy
1 B5V 2 SW_PW
3 B5V 4 A5V
5 GND 6 GND
7 B12VS 8 GND
9 B12VS 10 SW_INV
11 B13V 12 NC
13 B13V 14 DMM
Main Ass’y
14p cable
Speaker
Power Ass’y
LVDS cable
T-con
No
Does the signal appear at
CN1002 (Pin#12 , #7 )(HDMI1)
CN1003 (Pin#12 , #7 )(HDMI2)
CN1004 (Pin#12 , #7 )(HDMI3)
CN1001 (Pin#12 , #7 )(HDMI4)
(HDMI RX_Clk , RX_Data) ?
Does the digital data appear at
TP-E_TXCLK+, E_TXCLK- ,
O_TXCLK+, O_TXCLK-?
Yes
Yes
Yes
Yes
Yes
Check a set in the 'Stand-by mode'.
Check external devices and
connections.
Input the HDMI signal properly.
Please, Contact Tech support.
Check
CN601,CN602,CN603,CN604
Check HDMI cable
Change the Main Assy .
Check IC1001 (X5)
Change the Main Assy.
No
No
No
No
No
Power indicator LED is off.
Lamp(Backlight) on, no video ?
check the Self Diagnosis
(SupportSelf DiagnosisPicture Test)
Dose the promblem still exist self diagnosis ?
Check the HDMI source and
check the connection of HDMI cable ?
Check the LVDS cable ?
Check the T-Con B’d ?
Replace the LCD panel ?
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Caution Make sure to disconnect the power before working on the IP board.